Explanation
Marketing Cloud is a solution that the consultant can recommend to meet the requirement of providing an email marketing tool that all program staff can use for mass communications, and that can send emails that list missing application items to students. Marketing Cloud is a product that allows users to create and manage personalized and targeted email campaigns for customers or prospects. Marketing Cloud also integrates with Salesforce, so users can leverage their CRM data to segment and customize their email messages. Marketing Cloud also provides features such as Business Units and Roles, which can help control access to data, content, subscribers, reports, and settings for each program staff. Salesforce Mass Email, custom automation with an email alert, and Digital Engagement Messaging are not solutions that can meet the requirement of providing an email marketing tool that all program staff can use for mass communications, and that can send emails that list missing application items to students. References:
https://www.salesforce.com/products/marketing-cloud/overview/
https://trailhead.salesforce.com/en/content/learn/modules/marketing-cloud-basics